While Standard-Triumph had hoped to offer the DOHC 20X engine as an option in the Triumph TR4, standard power was to be the TR3’s familiar OHV four, commonly known as the “wet-sleeve” engine for its detachable cylinder liners, whose design allowed coolant to circulate through the space...
the basic design was growing long in the tooth. Giovanni Michelotti, fresh off his work on the Triumph Herald, was brought in to produce the designs for the TR3’s successor, the TR4. Yet the little TR3 was the car that had made Triumph’s name stateside, and American...